<%@ page language="java" contentType="text/html; charset=UTF-8"
         pageEncoding="UTF-8" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>标题</title>
</head>
<body>
    <c:set var="test1" value="test1" scope="application"></c:set>
    <c:set var="test1" value="test2" scope="application"></c:set>
    <c:remove var="test1" scope="application"></c:remove>
</body>
</html>